There are several direct international flights from most American and Canadian destinations arriving in San Jose del Cabo, (SJD), Baja California Sur, Mexico or you can connect through into San Francisco or Los Angeles. From San Jose del Cabo to la Paz it is a comfortable 3hr ride to the center of la Paz on one of many luxury Eco Baja Tours shuttle buses that leave at hourly intervals from the airport.
If you prefer to arrive directly into La Paz from a US or Canadian destination you could fly into San Diego International airport to connect.
If traveling on with Volaris airlines, http://www.volaris.com/en/our-destinations take their airline shuttle from San Diego airport to Tijuana airport on the Mexican side of the border.
Alternatively there is a frequent Downtown San Diego airport shuttle which will also transport you hassle free across the Mexican border to connect you with your departing flight from Tijuana airport.
By booking from between 40 days to 10 days prior to your departure you may find flights from $80USD – $150USD o/w from San Diego.
The most popular internet searches for the best airfares on Alaska Airlines, United Airlines, American Airlines, US Airlines and Spirit Airlines, to SJD, or to La Paz on Volaris are: